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Soon to be built 4inch housing piston, 3 inch porting

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: LikimysCrotchus5 » Sun Feb 10, 2008 10:11 pm

Well i have none of the saws above, as i said befoer i really dont have that many tools. I just have a hacksaw.

I do have sheet metals scissors, they are thick but its kindof hard to cut with them because they are bulky.

I think i can find a washer that will suit my needs.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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LikimysCrotchus5
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Unread postAuthor: LikimysCrotchus5 » Tue Apr 15, 2008 10:28 pm

My 4 inch piston cannon has been completed (just about)
It basically is a over-under design, but just enlarged to a 3 inch porting.

whats left is the barrel support, which is a must for a cannon this size, the breech, which is not too important and can be done later, and just sand down the piston a little (i had already done alot)

My piston is a 3 inch end cap.
The chamber is 8' of 4" pipe.
The barrel is 10' of 3" pipe.

I will get a picture soon.

I have not obviously tested it yet i just finished gluing and i hope it works!!

(I know that John Haehnel is making a piston out of epoxy and i wish the best of luck to him)

Here is a picture inside the tee.

Image

and here is another:

Image

more to come
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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LikimysCrotchus5
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Unread postAuthor: psycix » Wed Apr 16, 2008 4:11 am

Sweet!
Cant wait to see you piston :)
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